The Société Anversoise was a concession

Concession (territory)

In international law, a concession is a territory within a country that is administered by an entity other than the state which holds sovereignty over it. This is usually a colonizing power, or at least mandated by one, as in the case of colonial chartered companies.Usually, it is conceded, that...

 company of the Congo Free State

Congo Free State

The Congo Free State was a large area in Central Africa which was privately controlled by Leopold II, King of the Belgians. Its origins lay in Leopold's attracting scientific, and humanitarian backing for a non-governmental organization, the Association internationale africaine...

. It was, with the Lulonga Company

Lulonga Company

The Lulonga Company was a concession company of the Congo Free State. It was, with the Société Anversoise and the Abir Congo Company, one of the main producers of rubber in the Free State...

 and the Abir Congo Company

Abir Congo Company

The Abir Congo Company was a company which harvested natural rubber in the Congo Free State, the private property of King Leopold II of Belgium. The company was founded with British and Belgian capital and was based in Belgium...

, one of the main producers of rubber in the Free State. Alongside Abir and the Lulonga Company the Société Anversoise handed back control of the concession to the Congo Free State in 1906. The Société Anversoise merged with Abir in 1911 to form the Compagnie du Congo Belge with a focus of the management of rubber plantations instead of the harvesting of naturally occurring rubber. The Société Anversoise was quoted on the Antwerp Stock Exchange from 27 July 1898.